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            <div><h3 class="title">
                <a name="asio.reference.mutable_buffer"></a><a class="link" href="mutable_buffer.html"
                                                               title="mutable_buffer">mutable_buffer</a>
            </h3></div>
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    <p>
        <a class="indexterm" name="asio.indexterm.mutable_buffer"></a>
    </p>
    <p>
        Holds a buffer that can be modified.
    </p>
    <pre class="programlisting"><span class="keyword">class</span> <span class="identifier">mutable_buffer</span>
</pre>
    <h5>
        <a name="asio.reference.mutable_buffer.h0"></a>
        <span><a name="asio.reference.mutable_buffer.member_functions"></a></span><a class="link"
                                                                                     href="mutable_buffer.html#asio.reference.mutable_buffer.member_functions">Member
        Functions</a>
    </h5>
    <div class="informaltable">
        <table class="table">
            <colgroup>
                <col>
                <col>
            </colgroup>
            <thead>
            <tr>
                <th>
                    <p>
                        Name
                    </p>
                </th>
                <th>
                    <p>
                        Description
                    </p>
                </th>
            </tr>
            </thead>
            <tbody>
            <tr>
                <td>
                    <p>
                        <a class="link" href="mutable_buffer/data.html" title="mutable_buffer::data"><span class="bold"><strong>data</strong></span></a>
                    </p>
                </td>
                <td>
                    <p>
                        Get a pointer to the beginning of the memory range.
                    </p>
                </td>
            </tr>
            <tr>
                <td>
                    <p>
                        <a class="link" href="mutable_buffer/mutable_buffer.html"
                           title="mutable_buffer::mutable_buffer"><span
                                class="bold"><strong>mutable_buffer</strong></span></a> <span class="silver">[constructor]</span>
                    </p>
                </td>
                <td>
                    <p>
                        Construct an empty buffer. <br> <span class="silver"> —</span><br> Construct a buffer to
                        represent a given memory range.
                    </p>
                </td>
            </tr>
            <tr>
                <td>
                    <p>
                        <a class="link" href="mutable_buffer/operator_plus__eq_.html"
                           title="mutable_buffer::operator+="><span class="bold"><strong>operator+=</strong></span></a>
                    </p>
                </td>
                <td>
                    <p>
                        Move the start of the buffer by the specified number of bytes.
                    </p>
                </td>
            </tr>
            <tr>
                <td>
                    <p>
                        <a class="link" href="mutable_buffer/size.html" title="mutable_buffer::size"><span class="bold"><strong>size</strong></span></a>
                    </p>
                </td>
                <td>
                    <p>
                        Get the size of the memory range.
                    </p>
                </td>
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    <h5>
        <a name="asio.reference.mutable_buffer.h1"></a>
        <span><a name="asio.reference.mutable_buffer.related_functions"></a></span><a class="link"
                                                                                      href="mutable_buffer.html#asio.reference.mutable_buffer.related_functions">Related
        Functions</a>
    </h5>
    <div class="informaltable">
        <table class="table">
            <colgroup>
                <col>
                <col>
            </colgroup>
            <thead>
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                    <p>
                        Name
                    </p>
                </th>
                <th>
                    <p>
                        Description
                    </p>
                </th>
            </tr>
            </thead>
            <tbody>
            <tr>
                <td>
                    <p>
                        <a class="link" href="mutable_buffer/operator_plus_.html"
                           title="mutable_buffer::operator+"><span class="bold"><strong>operator+</strong></span></a>
                    </p>
                </td>
                <td>
                    <p>
                        Create a new modifiable buffer that is offset from the start of
                        another.
                    </p>
                </td>
            </tr>
            </tbody>
        </table>
    </div>
    <p>
        The <a class="link" href="mutable_buffer.html" title="mutable_buffer"><code class="computeroutput"><span
            class="identifier">mutable_buffer</span></code></a>
        class provides a safe representation of a buffer that can be modified. It
        does not own the underlying data, and so is cheap to copy or assign.
    </p>
    <h5>
        <a name="asio.reference.mutable_buffer.h2"></a>
        <span><a name="asio.reference.mutable_buffer.accessing_buffer_contents"></a></span><a class="link"
                                                                                              href="mutable_buffer.html#asio.reference.mutable_buffer.accessing_buffer_contents">Accessing
        Buffer Contents</a>
    </h5>
    <p>
        The contents of a buffer may be accessed using the <code class="computeroutput"><span
            class="identifier">data</span><span class="special">()</span></code> and <code class="computeroutput"><span
            class="identifier">size</span><span class="special">()</span></code> member functions:
    </p>
    <pre class="programlisting"><span class="identifier">asio</span><span class="special">::</span><span
            class="identifier">mutable_buffer</span> <span class="identifier">b1</span> <span
            class="special">=</span> <span class="special">...;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span
                class="identifier">s1</span> <span class="special">=</span> <span class="identifier">b1</span><span
                class="special">.</span><span class="identifier">size</span><span class="special">();</span>
<span class="keyword">unsigned</span> <span class="keyword">char</span><span class="special">*</span> <span
                class="identifier">p1</span> <span class="special">=</span> <span
                class="keyword">static_cast</span><span class="special">&lt;</span><span class="keyword">unsigned</span> <span
                class="keyword">char</span><span class="special">*&gt;(</span><span class="identifier">b1</span><span
                class="special">.</span><span class="identifier">data</span><span class="special">());</span>
</pre>
    <p>
        The <code class="computeroutput"><span class="identifier">data</span><span class="special">()</span></code>
        member function permits violations of type safety, so uses of it in application
        code should be carefully considered.
    </p>
    <h5>
        <a name="asio.reference.mutable_buffer.h3"></a>
        <span><a name="asio.reference.mutable_buffer.requirements"></a></span><a class="link"
                                                                                 href="mutable_buffer.html#asio.reference.mutable_buffer.requirements">Requirements</a>
    </h5>
    <p>
        <span class="emphasis"><em>Header: </em></span><code class="literal">asio/buffer.hpp</code>
    </p>
    <p>
        <span class="emphasis"><em>Convenience header: </em></span><code class="literal">asio.hpp</code>
    </p>
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